Where is it now
- Distance from Sun
- 31.396 AU
- True anomaly
- 315.83°
- Distance from Earth
- 31.605 AU
- As of
- 16 October 2026
Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.
In the sky
- Right ascension
- 18h 45m 52s
- Declination
- -24° 59′ 22″
- Constellation
- Sagittarius
- Distance from Earth
- 31.61 AU
- Elongation from the Sun
- 76.85° — well clear of the Sun
Favours the southern hemisphere; low or below the horizon from far north.
From your location
See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.
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Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.
Orbital elements
- Semi-major axis
- 38.961 AU
- Eccentricity
- 0.238
- Inclination
- 2.36°
- Orbital period
- 243.2 years
- Perihelion
- 29.689 AU
- Aphelion
- 48.232 AU
- Longitude of ascending node
- 45.37°
- Argument of periapsis
- 280.99°
- Epoch · J2000
- 2461200.5
- Orbit class · TNO
- Trans-Neptunian object
- Earth MOID · 11,160.5 LD
- 28.6776 AU
- Tisserand (Jupiter)
- 5.445
Orbit quality
Orbit reasonably well determined (uncertainty code 3).
- Observations used
- 34
- Data arc
- 17.94 years
- First observed
- 23 May 2001
- Last observed
- 2 May 2019
- Residual RMS
- 0.37 ″
- Solution · Otto Matic
- 1 July 2025
Visual & observation
- Absolute magnitude (H)
- 7.42
Discovery & classification
- Discovered by
- Buie, M. W.
- Discovery date
- 23 May 2001
- Discovery site
- Cerro Tololo
Also known as 2001 KN77
Sources
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB